Precision roller chains, agricultural chains, engineering-class chains, elevator buckets, environmental chains, and sprockets — designed to industry, ISO, and ANSI B29.1 standards. Made in America.
Allied-Locke consolidates engineering, reverse engineering, and lab testing under one roof — streamlining product development from design modeling to real-world performance assessment.
In-house CAD modeling for custom configurations — optimizing bore type, tooth count, torque, pitch, material, hub options, and finishes for new or existing systems.
Axial force fatigue testing per ISO 15654 and ASME B29.26, simulating real-world cyclic loading to validate fatigue limits across millions of cycles.
Non-contact 3D scanning captures precise geometries of worn or legacy components, converting them to accurate CAD models for exact replication.
Breaking-strength and elongation testing per ISO 606, ASME B29.1, and ASTM E8 — generating stress-strain curves to verify material performance.
Mechanical testing (tensile, hardness, fatigue, wear), metallography, failure analysis, surface testing, and non-destructive testing all in-house.
Manufactured at U.S. facilities in Illinois and Mississippi — precision roller chains and sprockets built to carry heavy loads and meet rigorous standards.
Technical data on roller chains, sprockets, and design guidelines for your application.
Product catalogs, specs, and manuals across all chain and sprocket categories.
All 1,279 Allied Locke chain and attachment part numbers listed on this page, grouped by family. Open a group to see every part number, then use the catalog above for dimensions and specifications, or request a quote.
ANSI and metric precision roller chains with superior fatigue resistance, strength, and longevity. Interchangeable, ISO/ANSI compliant, with hardened elements and corrosion-resistant options.
The North American standard for power transmission and conveying, built to ANSI B29.1 for full interchangeability.
Single-strand ANSI roller chain — the default choice for the majority of drive and conveyor applications. Riveted construction in all sizes, cottered in size 60 and larger.
Double, triple, and quadruple strand ANSI chain for drives that need more capacity in the same pitch. Strands run in parallel on matched multi-strand sprockets.
Heavy-series ANSI chain uses thicker sideplates than standard chain of the same pitch, raising the working load for demanding drive duty.
One-piece bushings and rollers hold lubrication in, extending wear life by more than 50% over standard curled construction.
A heavy-duty upgrade with through-hardened pins, wide-waist sideplates, ball-drifted holes, and solid bushings for greater strength and fatigue resistance.
Metric BS/ISO chain for European and internationally-built equipment. Not interchangeable with ANSI despite similar pitch basis.
Extended pins and twice the link plates double the tensile strength at the same pitch — built for lifting applications.
Engineered for the oilfield: shot-peened for fatigue resistance, wide-waist plates, ball-drifted holes, and hot-dip lubrication for deep joint penetration.
Twice the pitch of standard ANSI for lower cost per foot. A series (figure-8) for drives, C series (straight) for conveyors.
Bent, straight, extended-pin, and hole-type attachment plates that turn standard chain into a conveying solution.
Standard chain nickel-plated before assembly for corrosion resistance and a clean appearance, with near-standard strength.
304 and other stainless grades for full corrosion resistance in washdown, chemical, and food-processing environments.
Carbon-steel strength with corrosion resistance exceeding nickel plating, via a baked-on coating applied before and after assembly.
Oil-impregnated components give seizure-free life where lubrication is restricted. Runs on standard ANSI sprockets.
Nickel-plated pins, treated sideplates, and sintered oil-impregnated bushings for corrosion resistance plus low-maintenance running.
All-plate AL and BL series chain for pure tension and lifting duty — forklift masts, counterweights, and balancing linkages.
Inverted-tooth chain for high-speed, high-load, low-noise drives. Excel (side guide) and Silent (center guide) series.
Inverted-tooth silent chain with outer side-guide plates. High tensile strength and low-noise running at high speed.
Inverted-tooth silent chain with a center guide that runs in a sprocket groove for accurate tracking on wider drives.
Fine 3/16" pitch inverted-tooth chain for compact, high-speed, low-noise drives.
Bushing engages the sprocket directly for excellent wear resistance. Same strength and size as standard ANSI chain.
Flat sidebars instead of figure-8, preferred for conveyor and guided applications. Otherwise identical to ANSI chain.
Standard pitch but non-standard rollers, pins, or plates — to match legacy or special-built equipment.
Hollow pins accept cross rods and attachments for unlimited conveyor versatility. Runs on standard ANSI sprockets.
Extra clearance between pins, bushings, and sideplates lets the chain flex around curves and through twists.
Through-hardened carbon alloy pins for higher working load. Dimensionally equal to ANSI 50 and 60.
Rubber seals between plates hold lubrication in and keep contaminants out, greatly extending life in dirty environments.
Hand tools that break roller chain without hammers or punches. Replacement tips available.
Extended pins for insertion into conveyor rollers on citrus and produce sorting lines. Carbon and stainless.
G-1 holes in the link plates accept rods for wire-mesh belts or washing-station conveyors. Run in parallel strands.
One-piece forged dogs in ANSI roller chain, used to drive drop-forged chain conveyors.
Hardened-steel agricultural chains for combines, forage harvesters, spreaders, and balers. Built for high-cycle, dusty, and muddy field conditions with superior wear resistance.
Hardened steel parts to close tolerances for the strength and long life that combines, harvesters, and balers demand.
Pre-assembled flights and matched double-strand assemblies for corn heads, conveyors, elevators, spreaders, and forage wagons.
Corn-head and gathering chain assemblies, pre-built with flights to your row spacing. Made to order — request a quote with your equipment model and dimensions.
Flights pre-assembled onto agricultural roller chain for conveyors and elevators. Made to order — request a quote with flight spacing and chain size.
Flight assemblies built on steel detachable chain for spreaders and forage equipment. Made to order — request a quote with your requirements.
Slat-and-chain assemblies for apron and slat conveyors. Made to order — request a quote with slat size, spacing, and chain type.
Heat-treated parts and quad-staked pins. Open-barrel design prevents sprocket-root build-up for smoother, longer-wearing operation.
Hot-rolled strip steel, heat-treated for strength. Detachable links make field install and repair easy on moderate-load drives.
Clean design prevents clogging and binding, with greater material thickness for longer wear than detachable or pintle chains.
Developed for spreaders — increases fatigue and wear life, reduces stretch, and runs smoothly on standard #67 sprockets.
Pushers, slats, and flights for agricultural roller, pintle, detachable, and T-Bar chains, with standard and custom spacing.
A1, A2, K1, K2, SK, and specialty attachment links for agricultural roller chain — 64 variants for conveying, gathering, and material moving.
Pushers, slats, and flight attachments for steel pintle chain — 39 variants for spreaders, conveyors, and elevators.
Attachment links for steel detachable chain — 33 variants for light-to-moderate-duty conveying.
T-Bar attachment links for spreader and conveyor service.
Heavy-duty engineering-class chains and elevator buckets for grain processing, cement, steelmaking, and mining. High impact resistance with induction-hardened pins and through-hardened sideplates.
WH-series welded construction for high tensile strength in grain elevators, recycling, and abrasive drag conveying.
Bushed steel engineering-class chain for heavy bulk conveying, with added strength and wear resistance.
Bushed roller engineering-class chain — rollers reduce friction for drag and conveyor duty.
Bushed roller steel chain, small pitch (1–4 in), for compact heavy-duty drag and conveyor drives.
Bushed roller steel chain, medium pitch (4–6 in), for bulk conveying and elevating.
Bushed roller steel chain, large pitch (8+ in), for long-pitch heavy bulk handling.
Offset sidebar steel drive chain for heavy power transmission and odd-length mill runs.
X-type drop-forged links assemble without tools and resist heavy impact in overhead trolley and scraper conveyors.
Cast block links with steel sidebars combine wear resistance with strength for bucket elevators and bulk conveyors.
Heavy-duty H-class steel chain for sawmills, drag conveyors, and material transfer under sustained heavy loads.
Work-hardening cast manganese and alloy steel rivetless chains for the harshest, most abrasive bulk handling.
Style MD and other buckets with induction-hardened pins and through-hardened sideplates for grain, clinker, ore, and sand.
Collector and drive chains for wastewater and water treatment — grit collectors and rectangular clarifiers. Corrosion-resistant stainless and non-metallic options.
SS715/MSS78 stainless drive chains and non-metallic NCS-720S collector chain for grit collectors and rectangular clarifiers.
400-class steel pintle collector chain for grit collectors and clarifiers — 8 sizes.
700-class steel pintle collector chain for larger clarifier systems — 6 sizes.
Stainless drive and collector chains for corrosive wastewater service — 3 sizes.
Glass-reinforced non-metallic collector chain for maximum corrosion resistance — 2 sizes.
Flight and collector attachments for 400-class wastewater chain — 29 variants.
Flight and collector attachments for 700-class wastewater chain — 35 variants.
Stainless attachments for SS-series wastewater chain — 3 variants.
Non-metallic attachments for NCS720S/NH78 chain — 3 variants.
Complete system components for water and wastewater rectangular clarification — for new or refurbished facilities.
A-, B-, and C-Style sprockets compatible with all chain types. Stainless, carbon steel, or cast — ANSI compliant, with keyless bore, nickel plating, and hardened teeth options.
A-, B-, and C-Style sprockets compatible with all chain types. Stainless, carbon steel, or cast — ANSI compliant, with keyless bore, nickel plating, and hardened options. Made in America.
Black oxide ANSI roller chain sprockets from No.25 through No.240 — plate, hub, bored-to-size, taper bushed and QD bushed styles, plus ball bearing idlers and weld-on plates and hubs. 5,138 part numbers in stock.